No experience with the hog/boar bombs. I tried the buck bombs very briefly for fun, to me they are just too strong.
My experience with scent is similar: a little is good. A lot is worse than none.
The only time I know for a fact that using scent worked was in a late season (antlerless) hunt, I had no cover scent left, so I put some doe pee on my boots for the walk in...... I had a button buck come in on my back trail, nose to the ground.... poor guy looked up at the muzzle of my rifle kinda puzzled.....
Every time I have put out scent wicks and the whole nine yards, I have not seen anything.......